to the surge of deadly attacks on nato troops by afghan soldiers in recent months, known as gray on blue attacks. senior military analyst oliver north is imbeddeded with u.s. special operation forces in afghanistan and, lieutenant colonel north is streaming live from just outside of kabul. colonel? >> reporter: gregg, there is a remarkable number of young americans, out here, who are in harm's way, they have taken on the mission of helping the afghans begin to defend themselves, knowing there is a deadline and that deadline was set by the commander-in-chief, that you a us combat force are going to be out of this country, by 2014. that has many people concerned and some think it is one of the reasons why the green on blue attacks have increased. here is just some of what we have been seeing on this trip. today we traveled to remote out post where three marines were killed on a green on blue attack, and, we asked effect of the incident. >> in the aftermath of the events, has anyone come and said, we are sorry about what happened? >> sir, we have become like one of the village, one of the p